beforeEach(function () {
  this.addMatchers({
    toExactlyMatch: function (expected) {
      var a1, a2,
        l, i,
        key,
        actual = this.actual;

      var getKeys = function (o) {
        var a = [];
        for (key in o) {
          if (o.hasOwnProperty(key)) {
            a.push(key);
          }
        }
        return a;
      }
      a1 = getKeys(actual);
      a2 = getKeys(expected);

      l = a1.length;
      if (l !== a2.length) {
        return false;
      }
      for (i = 0; i < l; i++) {
        key = a1[i];
        expect(key).toEqual(a2[i]);
        expect(actual[key]).toEqual(expected[key]);
      }

      return true;
    }
  })
});
